168 results about "Caster angle" patented technology

A tilting, preferably three-wheeled, vehicle is disclosed that has a tilting mechanism that allows the vehicle to have leaning characteristics substantially similar to those offered by an in-line two-wheeled vehicle, but that does not require complex linkages and/or control systems to operate effectively. A tilting linkage is operably secured to a frame to allow a pair of spaced apart wheels to remain substantially aligned with the plane of the vehicle throughout its range of movement while still allowing the steering axes of each wheel to intersect the substantially vertical centerline of each wheel. The linkage also allows the caster angle of each wheel's pivot axis can be optimized independently of the angle of the vehicle's handlebar steering shaft.

The invention discloses a wheel load-based type intelligent sensing four-wheel positioning measurement method. The method comprises the following steps of: sensing the three-dimensional accelerations of specific points of wheels by using an intelligent sensing module; acquiring initial attitude angles of the wheels by using the three-dimensional acceleration parameters of the specific points of the wheels and an attitude algorithm and solving positioning parameters of the camber and the front wheel toe-in among the four wheels; establishing a kingpin caster angle and kingpin inclination computation model and solving positioning parameters of the kingpin caster and the kingpin inclination among the four wheels; and merging and analyzing four-wheel positioning parameters of the wheels, namely the camber, the front wheel toe-in, the kingpin caster and the kingpin inclination, to acquire a variation trend of the four-wheel positioning parameters of the wheels. By performing multi-sensor data merging and analysis on the parameters, the wheel load-based type intelligent sensing four-wheel positioning measurement method has the advantages of fully monitoring and predicating a wheel positioning state, ensuring the stability and the safety of automobile driving, reducing the abrasion and the oil consumption of automobiles, improving the steering performance of vehicles and ensuring automatic aligning of steering systems, and is a novel method for wheel positioning measurement.

The invention discloses an automobile steering wheel shimmy control method, which is characterized in that: the running speed V and the complete vehicle mass mw of the automobile are detected by sensors, the optimal caste angle alpha opt of the current automobile steering wheel is calculated and analyzed by a central control unit according to a preset differential equation of motion of a system, and the caster angle alpha of the steering wheel is adjusted by an executive unit in real time to ensure that the steering wheel is positioned in the optimal caster angle state so as to reduce the shimmy of the automobile steering wheel. The method can effectively solve the problem of wheel shimmy in the running process of the automobile, and improves the control stability and safety in the process of driving the automobile.

A three wheeled vehicle comprises a frame with a rear axle assembly that mounts a pair of spaced rear wheels. The rear axle assembly includes a rear axle, a caster arm disposed at opposite ends of the rear axle and defining a caster axis, and trailing arm assemblies that couple the rear wheels to the caster arms. The caster arms are outwardly and rearwardly inclined at a camber angle and a caster angle, respectively. The trailing arm assemblies position the rear wheels such that they contact the ground surface at a point offset from an intersection of the caster axis with the ground surface. As a result of this configuration, the vehicle can swing or spinout along an arcuate path and simultaneously tilt when a rider quickly turns.

A reel mower has a double A arm suspension that lowers a reel cutting unit into a cutting position in a tail down orientation and that levels the reel cutting unit out as it lifts the reel cutting unit into a transport position. The reel cutting unit yaws during turns about a substantially vertical axis having a negative caster angle. The suspension has clamps that can be flipped open or closed to quickly attach or detach the reel cutting unit. A drive motor can be quickly attached or detached to the reel cutting unit using a pivotal wire form. An active counterbalance system automatically offsets the increasing weight of a grass basket on the reel cutting unit to maintain quality of cut. The grass basket maintains a constant spacing relative to the reel cutting unit when the reel cutting unit pitches to improve clipping collection.

The invention relates to a multi-connecting-rod rectilinear movement hanger bracket adopting a ball spline pair. The multi-connecting-rod rectilinear movement hanger bracket comprises a spring shock absorber, wheels, a vehicle body, a steering knuckle, an upper-side first hanger bracket branched chain, an upper-sided second hanger bracket branched chain, a lower-side first hanger bracket branched chain and a lower-side second hanger bracket branched chain, wherein the spring shock absorber is hinged with the steering knuckle and the vehicle body respectively, the steering knuckle is matched with the wheels by wheel hub units, and the two ends of each hanger bracket branched chain are respectively hinged with the steering knuckle and the vehicle body. The multi-connecting-rod rectilinear movement hanger bracket has the advantages that the positional parameters such as the camber angle, the kingpin inclination angle and the caster angle of the wheels, the toe-in (toe-out) of the front wheel, the distance between the left wheel and the right wheel, and the distance between a front shaft and a rear shaft can be kept constant during the process that the wheels jump up and down, so that the abrasion of the tires is lowered greatly, and the operation stability, the driving smoothness and the riding comfort of the vehicle can be improved effectively; the hanger bracket branched chains are simple in structure, the ball spline pair can be changed after being abraded, and the service lives of the hanger bracket branched chains are prolonged.

The invention relates to a crawler type substation patrol robot based on a hub motor. The crawler type substation patrol robot based on the hub motor comprises a connector, an electrical cabinet, and two the same drive systems distributed at the left and right sides, the drive systems at the left and right sides are connected into a single unit through the connector, the connector and two support frames in the two drive systems are firmly connected in a relative translation regulation mode, and then the connector and two support frames can freely translate and slide to regulate the positions; the electrical cabinet is fixed on the connector; a motor in each drive system is the hub motor, a transmission component is omitted, and the structure is simplified. The crawler type substation patrol robot has a simple and novel drive mode. The crawler type substation patrol robot also can serve as a variable-structure robot, and a dip angle (top rake) between a drive wheel driving mechanism and a support wheel supporting mechanism, a dip angle (caster angle) between a guide wheel support mechanism and the support wheel supporting mechanism, and a height between the connector and the ground can be regulated according to the movement environment. The crawler type substation patrol robot can strain the crawler through regulating the position of the guide wheel support mechanism after the crawler becomes loose in the long-time movement. Compared with a traditional crawler type robot, the obstacle crossing performance and move flexibility of the robot are better.

The invention relates to a multi-link straight line guide independent suspension with a 3-RRR telescopic compensation mechanism. The suspension comprises a vehicle wheel, a vehicle body or a vehicle frame, a spring shock absorber system and a steering knuckle, wherein the steering knuckle is connected with the vehicle wheel through a hub unit; the spring shock absorber system is respectively connected with the steering knuckle and the vehicle boy or the vehicle frame through a ball pair; the suspension also comprises four suspension branched chains; each suspension branched chain comprises an inside link, an outside link and three same RRR kinematic chains formed by three rotating pairs; and the three same RRR kinematic chains are arranged along the axis of a suspension branched chain symmetrically at an angle of 120 degrees. By using the suspension, positioning parameters such as a vehicle wheel camber angle, a kingpin inclination angle, a kingpin caster angle, a vehicle wheel toe-in (toe-out), the distance between left and right wheels, wheel base and the like are remained unchanged all the time during a bouncing up and down process of the vehicle wheel, so that the abrasion of tires is reduced effectively, and the vehicle handling stability, the driving smoothness and the riding comfort degree can be improved effectively.

The invention discloses an electric wheel experimental device and method with a steering function in the field of electric vehicle testing. The electric wheel experimental device has a steering simulating mechanism capable of researching the load state and the motion characteristic of an electric wheel on a steering condition, uses a servo motor to drive a ball screw to drive multilayer slide blocks and the roller surface of an electric wheel compaction chassis dynamometer to generate vertical force for simulating the vertical load of the electric wheel; uses a kingpin, an electric push rod, and the multilayer slide blocks to simulate the wheel positioning parameters of the electric wheel, such as a kingpin caster angle; may research the influence of the positioning parameter on the operating condition performance tests of the electric wheel, guarantees that the electric wheel is more close to an actual operation state in test simulation in order to obtain accurate and reliable test results, may complete a load applying function, a steering simulating function, a tire positioning parameter simulating function, and an operating condition running function of the electric wheel, and achieves complete functions and a simulation effect complying with actual cases.

Disclosed herein are a suspension and an insulator of the same. A plurality of car body points are uniformly spaced apart from each other on an imaginary circle formed by the car body points, and a strut point is eccentric from the center of the circle formed by the car body points. As the insulator is rotated about the center of the imaginary circle, relative positions of the strut point from the center of the imaginary circle are adjusted in the front and rear direction of a car body. Consequently, a caster angle is easily changed. Also, the caster angle is adjusted according to kinds of vehicles or depending on whether a power steering system is included or not without changing the structure of the suspension.

The invention discloses a bionic adaptive PDC drill bit which is composed of a drill bit matrix, a plurality of cutting tooth assemblies and a plurality of drill bit wings. The plurality of drill bit wings are fixedly arranged at the upper end of the drill bit matrix. The plurality of cutting tooth assemblies are fixedly arranged on the plurality of drill bit wings. The bionic adaptive PDC drill bit simulates a prototype tiger paw bone. The bionic adaptive PDC drill bit is designed according to the adaptive characteristic of the pawl. A self protecting structure is realized through a joint movement by means of a biological paw. The cutting angle of the cutting tooth can be adaptively changed under the function of a stratum impact force in drilling into a complex stratum by the drill bit. After the drill bit drills into a hard rock, a caster angle enlarges and a lateral rotation angle reduces for protecting a composite sheet. After the drill bit drills into a soft rock, the caster angle reduces and the lateral rotation angle enlarges. A polycrystalline diamond compact can easier drill into the rock, thereby realizing high-efficiency rock crushing. The bionic adaptive PDC drill bit has advantages of realizing simple structure and convenient detachment, reducing and preventing impact damage of the cutting tooth by stratum change, effectively prolonging service life and drilling efficiency of the drill bit, and improving rock cutting efficiency and chip removal effect.

A vehicle front suspension device comprises a subframe assembly, a lower swing arm connected with the subframe assembly, and a damper assembly connected with the lower swing arm. The vehicle front suspension device also comprises a kingpin caster angle adjusting mechanism which is connected with one end of the damper assembly, the other end of the damper assembly is hinged to the lower swing arm, and the kingpin caster angle adjusting mechanism can drive the damper assembly to swing relative to the lower swing arm according to the change of the vehicle speed. The vehicle front suspension device can automatically adjust the kingpin caster angle to achieve the aim of low-speed steering flexibility and high-speed driving stability of a vehicle and further achieve a good effect of good matching of the driving properties and the speed of the vehicle.

The invention discloses a robust design method for positional parameters of front vehicle wheels. In the method, a robust design model for the positional parameters (a king pin inclination angle, a king pin caster angle, a front wheel camber angle, and a front wheel toe-in) of the front vehicle wheels is established by taking a multibody system dynamics theory as a basis, comprehensively considering the synergic relationship among a steering system, a drive system and a suspension system, analyzing the dynamics characteristics of the positional parameters of the front wheels under motor steering, straight running, wheel hopping and other various running states, integrating uncertain factors, such as the manufacturing errors of a steering trapezoidal arm, the assembling errors of a steering knuckle, a fit clearance between a steering mechanism and the suspension system, a designed variable numerical range, the preferences of all subgoal performances and the like, and taking the minimum angle turning error, the minimum sideslip during straight running and the minimum front wheel pivot angle during wheel hopping in a steering process as optimization goals. The robust design method disclosed by the invention has the advantage of improving the design level for the positional parameters of the front vehicle wheels in China, and can be widely applied to design of various types of vehicles.

The present invention provides a vehicle including wheels, and a steering module configured to steer the wheels in one of two mutually opposite right and left directions, or in one and the other of the two mutually opposite right and left directions, respectively. In the vehicle, a caster angle is set within the range of ±3 degrees relative to a kingpin angle. Though each wheel usually forms a camber angle when steered, by setting in the wheel the caster angle beforehand within the above range, the wheel does not or is less likely to form the camber angle because the camber angle and the caster angle cancel each other. Therefore, it is possible to prevent the steering angles of the wheels from being restricted, and to prevent the deterioration of steering operability.

The invention relates to a multifunctional intelligent posture correcting desk and chair, which is used for correcting sitting posture, reaches standard in sitting distance and viewing distance, precludes long-time sitting, guarantees light source standard, power utilization safety and more reasonable reading angles and assists comfort. A sitting posture fixing system is installed on the chair back of the desk and chair, distance adjustment systems are installed among bottoms of the desk and chair legs, an intelligent controlled forced long-time sitting reminding system is installed on right side of a desktop, a light sensing intelligent controlled illuminating system is installed in the middle of a desktop stationery rack, a safety electric shock prevention system is installed in the middle of the right outer side of the desk leg, an adjusting vertical angle reading plate system and an adjusting caster angle lying chair system are embedded on the surface, close to a person, in the middle of a desktop plate, and a resting system is installed in the middle of a connecting rod on the right legs of the desk. Particularly, after combined application, the desk and chair can comprehensively guarantee physical health.

The invention discloses a deep-water type down-umbrella aerator impeller. The deep-water type down-umbrella aerator impeller comprises an aerator impeller and an agitation impeller, wherein the agitation impeller is coaxially installed below the aerator impeller; the aerator impeller is installed at the lower end of a transmission shaft of a reduction box; the reduction box is driven by a motor; the aerator impellor comprises a center plate vertically connected to an impeller shaft; a plurality of aerator blades are arranged on the center plate; the upper ends of the aerator blades are obliquely connected with a pressurized-water plate; the lower end of the pressurized-water plate is connected to the center plate; a caster angle alpha is formed between each aerator blade and the radial direction of the impeller and a water-facing angle beta is formed between each aerator blade and the axial direction of the impeller; the lower end of each aerator blade is respectively collected in a base conical table; and the center plate, the aerator blades and the pressurized-water plate form the water-ejecting outlet of the impeller. By using the deep-water type down-umbrella aerator impeller provided by the invention, the water body flow and hydraulic jump height can be effectively improved, the agitated water is ejected through the water-ejecting outlet, and the formed water surface is fresher and can fully contact with air, thus reaching the aeration effect maximally; meanwhile, the agitation impeller can act as an axial flow effect, so that a liquid at the bottom of a deep groove can form an upward flow state and the bottom sludge can be prevented from settling.

Apparatus for adjusting the caster of the steering wheels of an all terrain vehicle. An eccentric threaded stud support is adjustively rotatable to position the eccentrically retained stud at a plurality of caster angle defining orientations extending from zero caster negatively or positively. Perceptible indicia identifies each caster incremental location.

The invention is a method of determining the geometry of a wheel of a vehicle and/or the geometry of the associated support or drive structure. In one embodiment, a gauge includes caster and camber vials or an electro-mechanical sensor for outputting caster and camber angle to a display. In use, the gauge is aligned with or referenced to an indicator, such as a slot or marking. In one embodiment, the indicator has a reference position of zero degrees caster angle. The gauge measures the current position of the indicator compared to its reference position. The gauge includes a connecting element for maintaining it in alignment with the indicator, such as a threaded ring which engages the spindle or a magnetic ring engaging a wheel hub.

The invention discloses a suspension four-wheel positioning parameter regulating device and a regulating method thereof. According to the device, only one of the two ends, connected with vehicle frame supporting pieces, of each lower suspension arm is provided with a structure used for driving the end of the lower suspension arm to move in the inside-outside direction of a vehicle, the other end is provided with a structure used for enabling the end of the lower suspension arm to rotate around a shaft extending vertically, and the structure used for driving the corresponding end of each lower suspension arm to move in the inside-outside direction comprises a camshaft. The regulating method of the suspension four-wheel positioning parameter regulating device comprises the step that ball pins of the lower suspension arms can be moved by rotating the front camshafts or rear camshafts. According to the suspension four-wheel positioning parameter regulating device and the regulating method thereof, the double wishbone independent suspension wheel positioning parameter regulating structure is simplified, the camber angle and the kingpin caster angle are regulated only through rear lining bolts and eccentric regulating cams arranged on the rear lining bolts, one regulating cam is omitted, the regulating procedure is simplified, and the regulating efficiency is improved.